Quote:
Originally Posted by JamesL
Ray,
Any idea why there is a seasonal restriction for curcubits but not for tomatoes?
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The cells of different species of plants may react differently to certain concentrations of the Phosphite ion which is a stable molecule within the plant. The Phosphite ion (P03) is not metabolized or readily oxidized in the plant tissue like the Phosphate anion (P04) is, so basically the Phosphite ion just sits there in the plant as it is for a very long time. Applying too much or too frequently causes it to build up in the plant tissue and can confuse the plant cells into sensing there is plenty of Phosphorus availability even when it's starved for Phosphorus. Don't apply Excel LG to a plant that is suffering from Phosphorous deficiency, it can make the problem much worse.